That boat barely made a ripple in the water, great for slalom, not so much for surfing. Giving a long board today and the same boat I wonder if it could be done, but I’d never try it behind an out board again, of course.

That was Lake Columbia, a private manmade lake. That's in the Irish Hills area near Jackson, Michigan and near the Michigan International Speedway. My parents bought an empty lot on a largely empty lake in about 1965 or 1966. Now the lake is packed.